A strategy for fabricating single layer graphene sheets based on a layer-by-layer self-assembly

1. Experimental Section
Materials: Anionic poly(styrenesulfonate); PSS (Mw = 70,000) and cationicpolyallylamine; PAA (Mw = 70,000) were used as received from Aldrich. Iron (III) chloride (Aldrich, reagent grade, 97%) as a metallic dopant was used without further purification.
Quartz substrate (3.0 cm 횞 3.0 cm, thickness of 1000 關m) was purchased from JMC Glass, manufactured in Korea......